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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html lang="en">
<head>
<meta http-equiv="Content-Type"
content="text/html; charset=utf-8">
<meta http-equiv="Content-Style-Type"
content="text/css">
<meta http-equiv="Content-Script-Type"
content="text/javascript">
<meta name="description"
content="FreeType Documentation">
<meta name="author"
content="Werner Lemberg">
<link rel="icon"
href="../../../image/favicon_-90.ico">
<link rel="shortcut icon"
href="../../../image/favicon_-90.ico">
<link rel="stylesheet"
type="text/css"
href="../../../css/freetype2_-90.css">
<script type="text/javascript"
src="../../../js/jquery-1.11.0.min.js">
</script>
<script type="text/javascript"
src="../../../js/jquery.ba-resize.min.js">
</script>
<script type="text/javascript"
src="../../../js/freetype2.js">
</script>
<style type="text/css">
@font-face {
font-family: "RasterInfo";
src: url("RasterInfo.ttf");
font-weight: normal;
font-style: normal;
text-rendering: optimizeLegibility; }
span.RasterInfo {
font-family: "RasterInfo"; }
span.RasterInfo-large {
font-family: "RasterInfo";
font-size: 96px;
line-height: 100%; }
div.zebra {
float: right;
text-align:center;
line-height: 300%; }
</style>
<title>The RasterInfo Font</title>
</head>
<body>
<div id="top"
class="bar">
<h1>The RasterInfo Font</h1>
</div>
<div id="wrapper">
<div class="colmask leftmenu">
<div class="colright">
<div class="col1wrap">
<div class="col1">
<!-- ************************************************** -->
<p><a href="RasterInfo.ttf"><code>RasterInfo.ttf</code></a> is
a means to show various properties of the TrueType bytecode
interpreter used to hint the TrueType fonts on the current
HTML page. If you only see one or more letters
‘E’ instead of digits, the TrueType bytecode
interpreter is not active.</p>
<p>At the same time, it is a showcase to demonstrate how to
change glyph shapes with TrueType instructions.</p>
<p>Now the characters contained in the font. The value in
parentheses gives the character to be used in the RasterInfo
font. For more details on the various parameters, please
consult the source code file for the font, to be found
on <a href="https://github.com/lemzwerg/RasterInfo/blob/master/RasterInfo.m4">github</a>.
The special zebra glyphs (‘#$’) are designed
to test gamma correction and LCD filtering; they should not,
ideally, have any moiré or color fringes.</p>
<div class="zebra"><span class="RasterInfo-large">#$</span><br>
#$</div>
<div class="quote">
<p>The current PPEM value used in this paragraph
(‘0’): <span class="RasterInfo">0</span></p>
<p>The version of the TrueType bytecode interpreter
(‘1’): <span class="RasterInfo">1</span></p>
<p>If rotation is on, digit 1 is shown
(‘2’): <span class="RasterInfo">2</span></p>
<p>If stretching is on, digit 1 is shown
(‘3’): <span class="RasterInfo">3</span></p>
<p>If grayscale rendering is on, digit 1 is shown
(‘4’): <span class="RasterInfo">4</span></p>
<p>If ClearType is enabled, digit 1 is shown
(‘5’): <span class="RasterInfo">5</span></p>
<p>If ClearType's compatible width mode is on, digit 1
is shown
(‘6’): <span class="RasterInfo">6</span></p>
<p>If ClearType uses vertical LCD subpixels (this is, a
subpixel's longer side is horizontally positioned),
digit 1 is shown
(‘7’): <span class="RasterInfo">7</span></p>
<p>If ClearType uses BGR (blue-green-red) rendering instead
of RGB (red-green-blue), digit 1 is shown
(‘8’): <span class="RasterInfo">8</span></p>
<p>If ClearType uses subpixel positioning, digit 1 is
shown
(‘9’): <span class="RasterInfo">9</span></p>
<p>If ClearType symmetrical smoothing is active,
digit 1 is shown
(‘:’): <span class="RasterInfo">:</span></p>
<p>If Gray ClearType is active, digit 1 is shown
(‘;’): <span class="RasterInfo">;</span></p>
</div>
<p>As an example, the image below shows the values as
displayed by the Edge browser (version 40) on
Windows 10.</p>
<p align="center">
<img src="RasterInfo Windows 10 Edge 40.png"
height="240"
width="400"
alt="RasterInfo display on Windows 10 using Edge 40">
</p>
<p>On this page, the font is set up with
an <code>@font-face</code> CSS instruction, to be used
within a <code>span</code>.</p>
<pre>
<head>
...
<style type="text/css">
@font-face {
font-family: "RasterInfo";
src: url("RasterInfo.ttf");
font-weight: normal;
font-style: normal;
text-rendering: optimizeLegibility; }
...
span.RasterInfo { font-family: "RasterInfo"; }
</style>
</head>
<body>
...
<span class="RasterInfo">1</span>
...
</body></pre>
<p><a href="RasterInfo.ttf"><code>RasterInfo.ttf</code></a>
was written by Werner Lemberg; the font is licensed under
the <a href="https://opensource.org/licenses/OFL-1.1">SIL
Open Font License</a>. The current version is 1.02.</p>
<div class="updated">
<p>Last update: 13-Feb-2018</p>
</div>
</div>
</div>
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